Primary 6 September Review 1

Transcription

1 Number of coins Primary 6 September Review 1 50 Section A: 10 Questions, 15 marks Questions 1 to Questions 5 carry 1 mark each. Questions 6 to Questions 10 carry 2 marks each. Choose the correct answer and write it in the bracket provided. Calculators are not allowed in this section. 1. Find the value of ( ) (1) 74 (2) 76 (3) 330 (4) 389 ( ) 2. Which of the following has the smallest value? (1) (2) (3) (4) ( ) 3. The graph below shows the number of 10, 20, 50 and $1 coins in a box. Find the ratio of the number of 20 coins to the total number of coins in the box cent 20-cent 50-cent 1-dollar (1) 3 : 10 (2) 1 : 10 (3) 2 : 5 (4) 1 : 5 ( ) 1 P6/Sep/Review1

2 4. Which of the following can be folded to form a cuboid? (1) (2) (3) (4) ( ) 5. In the diagram below, the figures are drawn on a square grid. How many figures have a line of symmetry? (1) 1 (2) 2 (3) 3 (4) 4 ( ) 2 P6/Sep/Review1

3 6. A carton can hold either 18 big cubes or 72 small cubes. If there are already 4 big cubes and 10 small cubes in the carton, how many more small cubes can the carton hold? (1) 40 (2) 46 (3) 50 (4) 58 ( ) 7. In the diagram below, STU is a straight line and WX is parallel to YZ. Find WSV. V W 65 S X Y 135 T Z U (1) 45 (2) 70 (3) 110 (4) 135 ( ) 8. The figure below shows 20 identical cubes which were glued together to form a solid. The whole solid including the base was then painted. How many cube(s) had only one of its/their faces painted? (1) 0 (2) 1 (3) 2 (4) 4 ( ) 3 P6/Sep/Review1

4 9. The figure below is made up of 6 identical triangles. Find its area. 3 cm 3 cm (1) 27 cm² (2) 30 cm² (3) 36 cm² (4) 54 cm² ( ) 10. The figure below is made up of 3 squares. Find the shaded area. 4 cm 3 cm 5 cm (1) cm² (2) cm² (3) 18 cm² (4) 25 cm² ( ) 4 P6/Sep/Review1

5 Section B: 10 Questions, 15 marks Questions 11 to 15 carry 1 mark each. Questions 16 to 20 carry 2 marks each. Show your mathematical statements clearly in the space provided and write your answers in the blank provided. No calculator is allowed in this section. 11. Write in decimal, correct to 2 decimal places, a number which is greater than but smaller than. Ans: 12. 5% of km is equal to 24.6 km. What is the missing number? Ans: 13. What is the sum of all the common factors of 36, 48 and 60? Ans: 5 P6/Sep/Review1

6 14. Nancy spent $55 on her birthday. That was 8% of the money of her savings. What was her savings at first? Ans: $ 15. Mr Johnson started work on a sculpture at 1.45 a.m. and completed it at 9.30 p.m. on the same day. How much time did he take to complete the sculpture? Ans: h 16. Mr Ming paid $28 for a vase after a 20% discount. What is the price of the vase before the discount? Ans: $ 6 P6/Sep/Review1

7 17. The shaded figure below shows the net of an open box. Shade a square to give a lid to the box. 18. The Line AB is 14 cm. Find the sum of the circumferences of the 2 circles. (Take π = ) A B Ans: cm 19. The figure below is made up of 4 identical quadrants. If AB = 14 cm, find the perimeter of the shaded figure. A B Ans: cm 7 P6/Sep/Review1

8 20. Look at the number patter in the squares below. What is the missing number? 2x 6x 4a 12a 6h 18h x 3x 2a 6a 3h? Ans: Section C: 6 Questions, 20 marks For Questions 21 to 26, show your steps in the space provided for each question and write your answers in the spaces provided. The marks for each question is shown in the [ ] at the end of the question. Calculators can be used in this section. 21. Mr Wong bought 36 T-shirts for his pupils. He paid $12 for a large-sized T-shirt and $8 for each small-sized T-shirt. How many large-sized T-shirts did he buy if he paid $376 for all the T-shirts? Ans: [2] 8 P6/Sep/Review1

9 22. Maureen paid $28.30 for 7 slices of cake and 12 sandwiches. The total cost of a slice of cake and a sandwich was $3.40. Jerry bought 2 slices of cake and 4 sandwiches. How much change would Jerry receive if he paid the cashier $50? Ans: [2] 23. Mrs Isaacs baked 120 beef pies and chicken pies. After she gave away of the beef pies and of the chicken pies, she was left with 30 beef pies. How many chicken pies had she left? Ans: [3] 9 P6/Sep/Review1

10 24. Jasper bought 50 packets of sugar and rice. The total mass of the rice was 16.4 kg more than the total mass of the sugar. The mass of each packet of rice was 2 kg while each packet of sugar weighed 1.8 kg. How many packets of sugar did Jasper buy? Ans: [4] 25. At 6.10 p.m., Mr Koh and his wife left their offices and drove along the same direction home. Mr Koh, whose office was further away from home, drove at an average speed of 60 km/h. His wife drove at an average speed of 45 km/h. The distance between Mr Koh s office and his wife s office was 25 km. At what time did Mr Koh overtake his wife? Ans: [4] 10 P6/Sep/Review1

11 26. A rectangular tank, 20 cm long, 25 cm wide and 10 cm tall, is filled with water as shown in the diagram below. When 4 l of water was poured into the tank, some water overflowed and was collected in a rectangular tray with a base area of 250 cm. Find the height of the water level in the rectangular tray. Ans: [5] 11 P6/Sep/Review1